<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<head>
<style type="text/css">
    body {
        background: url(背景7.jpg) no-repeat center center fixed;
        background-size: cover;
        min-height: 100vh;
        box-sizing: border-box;
        margin: 0;
        padding-top: calc(50vh - 6em);
        font: 150%/1.6 Baskerville, Palatino, serif;
    }
</style>
</head>
<body>
<center>
<h1>线上销售统计系统</h1>
</center>
</body>
